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Blood Ammonia Colorimetric Assay Kit
SKU: E-BC-K145-S-100
Blood Ammonia Colorimetric Assay Kit
| SKU # | E-BC-K145-S |
| Detection Instrument | Spectrophotometer (635 nm) |
| Detection method | Colorimetric method |
Product Details
Properties
| Synonyms | NH3 |
| Sample Type | Serum, plasma |
| Sensitivity | 0.01 mmol/L |
| Detection Range | 0.01-2.0 mmol/L |
| Detection Method | Colorimetric method |
| Assay type | Quantitative |
| Assay time | 65 min |
| Precision | Average inter-assay CV: 5% | Average intra-assay CV: 4.700% |
| Other instruments required | Micropipettor, Vortex mixer, Incubator, Centrifuge |
| Other reagents required | Normal saline (0.9% NaCl) |
| Storage | 2-8℃ |
| Valid period | 12 months |
Detection Principle
Blood protein can be precipitated with protein precipitator, and enzyme activity will be destroyed, which can prevent the formation of free ammonia in vitro. Most interfering color substances were removed at the same time, indigo was formed in non-protein filtrate by Berthelot reaction, and the color depth was proportional to the content of blood ammonia. Blood ammonia content can be determined by comparing with standard solution.
Kit Components & Storage
| Item | Component |
Size 1 (50 assays) |
Size 2 (100 assays) |
Storage |
| Reagent 1 | Acid Reagent | 35 mL × 1 vial | 35 mL × 2 vials | 2-8°C, 12 months |
| Reagent 2 | Chromogenic Agent A |
60 mL ×1 vial | 60 mL ×2 vials | 2-8°C, 12 months, shading light |
| Reagent 3 | Chromogenic Agent B |
60 mL ×1 vial | 60 mL ×2 vials | 2-8°C, 12 months, shading light |
| Reagent 4 | 7 mmol/L Ammonia Standard | 2 mL × 1 vial | 2 mL × 1 vial | 2-8°C, 12 months |
| Reagent 5 | Standard Diluent | 50 mL × 1 vial | 50 mL × 1 vial | 2-8°C, 12 months |
Note: The reagents must be stored strictly according to the preservation conditions in the above table. The reagents in different kits cannot be mixed with each other. For a small volume of reagents, please centrifuge before use, so as not to obtain sufficient amount of reagents.
Technical Data:
Parameter:
Intra-assay Precision
Three human serum samples were assayed in replicates of 20 to determine precision within an assay. (CV = Coefficient of Variation)
| Parameters | Sample 1 | Sample 2 | Sample 3 |
| Mean (mmol/L) | 0.35 | 1.05 | 1.60 |
| %CV | 5.0 | 4.6 | 4.5 |
Inter-assay Precision
Three human serum samples were assayed 20 times in duplicate by three operators
to determine precision between assays.
| Parameters | Sample 1 | Sample 2 | Sample 3 |
| Mean (mmol/L) | 0.35 | 1.05 | 1.60 |
| %CV | 4.8 | 5.1 | 5.1 |
Recovery
Take three samples of high concentration, middle concentration and low concentration to test the samples of each concentration for 6 times parallelly to get the average recovery rate of 104%.
| Standard 1 | Standard 2 | Standard 3 | |
| Expected Conc. (mmol/L) | 0.65 | 1.2 | 1.7 |
| Observed Conc. (mmol/L) | 0.7 | 1.2 | 1.8 |
| Recovery rate (%) | 105 | 103 | 104 |
Sensitivity
The analytical sensitivity of the assay is 0.01 mmol/L. This was determined by adding two standard deviations to the mean O.D. obtained when the zero standard was assayed 20 times, and calculating the corresponding concentration.
Standard Curve
As the OD value of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique or temperature effects), so the standard curve and data are provided as below for reference only
| Concentration (mmol/L) | 0 | 0.2 | 0.4 | 0.8 | 1.0 | 1.5 | 2 | 0 |
| Average OD | 0.010 | 0.075 | 0.140 | 0.269 | 0.332 | 0.492 | 0.663 | 0.010 |
| Absoluted OD | 0 | 0.065 | 0.130 | 0.259 | 0.332 | 0.482 | 0.653 | 0 |